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    CVE-2023-0386

    A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system.

    Published:Jan 24, 2023
    Last Modified:Nov 4, 2025
    EPS:Mar 22, 2023
    EPSS Score:0.58698
    CVSS Score:7.8

    CISA Notification

    Description

    A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system.

    Required Action:

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

    Notes:

    No extra notes provided.

    Due Date
    Jul 8, 2025
    430 days ago
    Alert Date
    Jun 17, 2025
    451 days ago

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Netapp
    Product
    H300s
    Vendor
    Netapp
    Product
    H300s Firmware
    Vendor
    Netapp
    Product
    H410c
    Vendor
    Netapp
    Product
    H410c Firmware
    Vendor
    Netapp
    Product
    H410s
    Vendor
    Netapp
    Product
    H410s Firmware
    Vendor
    Netapp
    Product
    H500s
    Vendor
    Netapp
    Product
    H500s Firmware
    Vendor
    Netapp
    Product
    H700s
    Vendor
    Netapp
    Product
    H700s Firmware
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhev Hypervisor

    Exploits

    https://github.com/abedallarawashdeh/HTB-TwoMillion-machinehttps://github.com/anxs3c/TwoMillion-Machine-Writeuphttps://github.com/chenaotian/CVE-2023-0386https://github.com/churamanib/CVE-2023-0386https://github.com/dragosbanica/CVE-2023-0386_POChttps://github.com/EstamelGG/CVE-2023-0386-libshttps://github.com/Fanxiaoyao66/CVE-2023-0386https://github.com/huovnn/CVE-2023-0386-go-pochttps://github.com/julianertle/CVE-2023-0386-CTFhttps://github.com/karimelsheikh1/HTB-TwoMillion-Writeuphttps://github.com/letsr00t/CVE-2023-0386https://github.com/orilevy8/cve-2023-0386https://github.com/P4x1s/CVE-2023-0386https://github.com/puckiestyle/CVE-2023-0386https://github.com/pwncone/CVE-2023-0386-OverlayFShttps://github.com/Satheesh575555/linux-4.19.72_CVE-2023-0386https://github.com/sxlmnwb/CVE-2023-0386https://github.com/veritas501/CVE-2023-0386https://github.com/xkaneiki/CVE-2023-0386

    Common Weakness Enumeration

    CWE-282 Improper Ownership Management

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-17 Using Malicious Files
    CAPEC-35 Leverage Executable Code in Non-Executable Files

    Related CVEs

    CVE-2026-13476 (CVSS 7.3) — IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co…
    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a
    https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html
    https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
    https://security.netapp.com/advisory/ntap-20230420-0004/
    https://www.debian.org/security/2023/dsa-5402
    http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f11ada10d0a
    https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html
    https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
    https://security.netapp.com/advisory/ntap-20230420-0004/
    https://www.debian.org/security/2023/dsa-5402
    https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0386

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High